Electrical Theory 5th 1st Final Exam
Questions With Solved Solutions.
Which ITE tier site(s) is/are fault tolerant? - Answer Tier 4
When utility power is lost or a sever disturbance occurs, the UPS ___________ will shut down. - Answer
Input section
In the ________ UPS the inverter is always on and connected to the output of the UPS. - Answer Line
interactive
The easiest battery type to service is __________. - Answer Battery cartridge with internal lead acid
batteries
A _________ is an element of the electrical distribution system that at some point will cause downtime if
a means to by- pass it is not developed in the system. - Answer SPOF
Ground path continuity should be tested for _________ and any ground path utilizing a conduit raceway
as the conducting path must have all bolted or screwed connections checked and tested. - Answer Low
impedance
Large flooded cell battery installation will usually require extensive __________ and may require cell
changes which are a specialized function requiring training and certification. - Answer Preventative
maintenance
All isolation transformers have an inherent phase shift from primary to secondary of __________ which
when used in by-pass configuration would create a potentially disruptive phase conflict when the UPS
went to static by-pass. - Answer 30 degrees
PEM is a type of fuel cell. PEM stands for _________. - Answer Proton exchange membrane
, The byproduct(s) of fuel cells is/are __________. - Answer Water, heat and electricity
What are the two classifications for fuel cells that provide AC power as an output? - Answer Interactive
fuel cell system
What was the first type of automated control system used to control the indoor environment in a
commercial building? - Answer Pneumatic control system
_________ accepts a control signal and causes a mechanical motion. - Answer An actuator
A hydroelectric-generating plant uses __________ to generate electricity. - Answer Water flow
An overcurrent protective device prevents _________ from reaching excessively high temperatures, due
to high currents, by opening the circuit. - Answer Conductors or devices
__________ are caused by loads near the beginning of a power distribution system, incorrectly wired
transformer taps, and large loads being turned off. - Answer Voltage swells
What type of UPS system has high efficiency, small size, and is lower in cost than other types of UPS
systems - Answer Stand-by
________ is the intentional reduction of electrical power to a lamp in order to reduce its light output. -
Answer Dimming
Ballasts that are based on inductors are often called __________ ballasts because an inductor is a coil of
wire that creates a magnetic field, which resists changes in the current flow through the coil
. - Answer Magnetic
A(n) ____________ is an electric lamp that produces light by striking an electrical arc across tungsten
electrodes housed inside an arc tube. - Answer High intensity discharge lamp
_________ are the most common form of automatic lighting control used in buildings
Questions With Solved Solutions.
Which ITE tier site(s) is/are fault tolerant? - Answer Tier 4
When utility power is lost or a sever disturbance occurs, the UPS ___________ will shut down. - Answer
Input section
In the ________ UPS the inverter is always on and connected to the output of the UPS. - Answer Line
interactive
The easiest battery type to service is __________. - Answer Battery cartridge with internal lead acid
batteries
A _________ is an element of the electrical distribution system that at some point will cause downtime if
a means to by- pass it is not developed in the system. - Answer SPOF
Ground path continuity should be tested for _________ and any ground path utilizing a conduit raceway
as the conducting path must have all bolted or screwed connections checked and tested. - Answer Low
impedance
Large flooded cell battery installation will usually require extensive __________ and may require cell
changes which are a specialized function requiring training and certification. - Answer Preventative
maintenance
All isolation transformers have an inherent phase shift from primary to secondary of __________ which
when used in by-pass configuration would create a potentially disruptive phase conflict when the UPS
went to static by-pass. - Answer 30 degrees
PEM is a type of fuel cell. PEM stands for _________. - Answer Proton exchange membrane
, The byproduct(s) of fuel cells is/are __________. - Answer Water, heat and electricity
What are the two classifications for fuel cells that provide AC power as an output? - Answer Interactive
fuel cell system
What was the first type of automated control system used to control the indoor environment in a
commercial building? - Answer Pneumatic control system
_________ accepts a control signal and causes a mechanical motion. - Answer An actuator
A hydroelectric-generating plant uses __________ to generate electricity. - Answer Water flow
An overcurrent protective device prevents _________ from reaching excessively high temperatures, due
to high currents, by opening the circuit. - Answer Conductors or devices
__________ are caused by loads near the beginning of a power distribution system, incorrectly wired
transformer taps, and large loads being turned off. - Answer Voltage swells
What type of UPS system has high efficiency, small size, and is lower in cost than other types of UPS
systems - Answer Stand-by
________ is the intentional reduction of electrical power to a lamp in order to reduce its light output. -
Answer Dimming
Ballasts that are based on inductors are often called __________ ballasts because an inductor is a coil of
wire that creates a magnetic field, which resists changes in the current flow through the coil
. - Answer Magnetic
A(n) ____________ is an electric lamp that produces light by striking an electrical arc across tungsten
electrodes housed inside an arc tube. - Answer High intensity discharge lamp
_________ are the most common form of automatic lighting control used in buildings
